package tools;

import java.awt.FlowLayout;

import javax.swing.JComboBox;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.border.EmptyBorder;

import bdgrade.BdGrade;

public class ComboBoxDemo extends JFrame{
		public ComboBoxDemo(){
			this.setTitle("下拉列表框使用");
			this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
			this.setBounds(100,100,250,100);
			JPanel contentPane=new JPanel();
			contentPane.setBorder(new EmptyBorder(5,5,5,5));
			this.setContentPane(contentPane);
			contentPane.setLayout(new FlowLayout(FlowLayout.CENTER,5,5));
			JLabel label=new JLabel("证件类型:");
			contentPane.add(label);
			JComboBox comboBox=new JComboBox();
			comboBox.addItem("身份证");
			comboBox.addItem("驾驶证");
			comboBox.addItem("军官证");
			contentPane.add(comboBox);
			this.setVisible(true);
		}    
		public static void main(String[] args) {
			new ComboBoxDemo();
		}
}
